CHICAGO (AP) — Illinois Rep. Joe Walsh, the tea party-backed Republican who squeaked into office last year by vowing to bring fiscal responsibility to Washington and who has been one of President Barack Obama's most outspoken critics during the standoff over the debt ceiling, is being sued for more than $100,000 in unpaid child support, a newspaper reported. The freshman congressman's ex-wife, Laura Walsh, filed the claim against him in December as part of their divorce case, saying he owed $117,437 to her and their three children, the Chicago Sun-Times reported in a story published Wednesday. *** Walsh, in a...